机动ProTaper和Mtwo器械用于弯曲根管预备的临床评价

目的:评价机用ProTaper和Mtwo对弯曲根管的预备效果。方法:将临床需行根管治疗的171颗磨牙随机分为三组,分别采用ProTaper、Mtwo及不锈钢K锉对磨牙弯曲根管进行预备,比较器械折断、根管预备时间、术后反应及根管成型及充填情况。结果:根管预备时间:Mtwo的操作时间5.4 min比ProTaper的6.8 min和不锈钢K锉的13.6min短,ProTaper和Mtwo器械预备的根管锥度和流畅度均好,术后疼痛发生少。结论:ProTaper和Mtwo器械用于预备磨牙弯曲根管,效率高,成形能力佳。Mtwo器械应用常规预备法简单,预备时间短且有效。

Clinical evaluation of rotary ProTaper and Mtwo instruments in curved root canals preparation

Objective：To evaluate ProTaper and Mtwo Instruments in curved Root Canals Preparation.Method：A total of 171 molars treated by root canal therapy were randomly assigned to three groups： ProTaper group,Mtwo group and K group.Wearing and tearing degree of equipment,preparation time and postoperative pain of 3 groups were also compared.Result：The average root canal preparation time of the Mtwo group was 5.4 min,significantly less than the ProTaper（6.8 min） group and the K（13.6 min）.In three groups,root canals of ProTaper group and Mtwo group,could maintain the root canal anatomy in early form,and achieved good preparation results.Conclusion：Two nickel-titanium systems tested in this study are effective in the curved root canal preparation.The Mtwo instrument is much easier and faster during preparation with routine preparation technique.